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基于滑移面夹角线性变化的盾构隧道松动土压力计算方法研究

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现代隧道技术 2024年第3期61卷 8-17页

作者：黄戡吴奇江邓喜李徽长沙理工大学土木工程学院长沙410114

基于滑移面形态随相对位移的变化而变化,并考虑盾构隧道不同地层损失下土拱演化过程,提出滑移面夹角线性变化计算方法。分析极限平衡状态下受力微分方程以求解松动土压力表达式,并考虑滑移面高度随相对位移的变化以分析地层拱对边界条... 详细信息

基于滑移面形态随相对位移的变化而变化,并考虑盾构隧道不同地层损失下土拱演化过程,提出滑移面夹角线性变化计算方法。分析极限平衡状态下受力微分方程以求解松动土压力表达式,并考虑滑移面高度随相对位移的变化以分析地层拱对边界条件的影响。通过颗粒流数值分析模拟,研究不同工况下土拱比的变化规律以验证理论计算模型的合理性。结果表明:平均竖向应力随深度的增加而增大,但增长率逐渐变小;土拱演化过程以应力恢复为主,土拱比从0.326缓慢增大至0.495;埋深比和内摩擦角越大,土拱比越小。

关键词：盾构隧道土拱效应滑移面倾角松动土压力

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生物有机肥对番茄产量及品质的影响

农业技术与装备 2024年第4期 181-183页

作者：黄侃百色市农牧渔技术推广中心广西壮族自治区百色533000

为了探讨生物有机肥对番茄产量和品质的影响,以番茄品种西大一号为研究对象,采用完全随机设计,共设置5个处理组。试验结果表明,施用80%复合肥+20%生物有机肥最有利于促进番茄的生长和产量的提高,且番茄果实品质最优,维生素和糖酸含量比... 详细信息

为了探讨生物有机肥对番茄产量和品质的影响,以番茄品种西大一号为研究对象,采用完全随机设计,共设置5个处理组。试验结果表明,施用80%复合肥+20%生物有机肥最有利于促进番茄的生长和产量的提高,且番茄果实品质最优,维生素和糖酸含量比最高。

关键词：有机肥番茄产量品质影响

基于FPGA的硅光电池微弱电流信号检测技术研究

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通信电源技术 2024年第2期41卷 62-64页

作者：王金黄侃江西交通职业技术学院江西南昌330013

硅光电池是一种基于光电效应将光能转化成电能的半导体器件,已得到广泛应用,但目前对其输出的微弱电流信号的检测方法却不够准确。文章提出一种基于现场可编程门阵列(Field Programmable Gate Array,FPGA)和多级精密运算放大的多通道硅... 详细信息

硅光电池是一种基于光电效应将光能转化成电能的半导体器件,已得到广泛应用,但目前对其输出的微弱电流信号的检测方法却不够准确。文章提出一种基于现场可编程门阵列(Field Programmable Gate Array,FPGA)和多级精密运算放大的多通道硅光电池微弱电流信号检测方法,能够实现μA级微弱电流信号检测。通过实际项目运行测试,检测系统具有精度高、稳定性好等特点,可广泛应用于微弱电流信号和其他μA级电流精密检测场合。

关键词：硅光电池微弱信号检测电路

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岩土复合地层双孔隧道开挖对地表沉降的影响

水力发电 2024年第1期50卷 15-19,61页

作者：黄戡黄先强杨海涛长沙理工大学土木工程学院湖南长沙410114 深圳大学土木与交通工程学院广东深圳518061

为研究岩土复合地层中双孔平行隧道开挖对地表沉降的影响,提出一种基于复变函数理论和随机介质理论相结合的计算方法,讨论不同隧道开挖半径、隧道间距以及土层主要影响角对地表沉降的影响。结果表明,相较于不分层理论,考虑岩土分层的计... 详细信息

为研究岩土复合地层中双孔平行隧道开挖对地表沉降的影响,提出一种基于复变函数理论和随机介质理论相结合的计算方法,讨论不同隧道开挖半径、隧道间距以及土层主要影响角对地表沉降的影响。结果表明,相较于不分层理论,考虑岩土分层的计算结果与有限元结果更加吻合;随着隧道开挖半径的增大,地表沉降随之增大;随着隧道间距的增大,地表最大沉降值随之减小,沉降曲线形态发生变化;随着土层主要影响角的增大,地表最大沉降值随之增大,地表沉降槽宽度变小。

关键词：地表沉降岩土复合地层双孔隧道开挖影响复变函数理论随机介质理论

Towards Energy Efficient Shape Rolling:Roll Pass Optimal Design and Case Studies

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Chinese Journal of Mechanical Engineering 2019年第3期32卷 78-88页

作者： kan huang Bin huang Lei Fu Kazem Abhary School of Civil Engineering Changsha University of Science and TechnologyChangsha 410114China School of Engineering University of South AustraliaAdelaideSouth Australia 5095Australia

Shape rolling is widely employed in the production of long workpieces with appropriate cross-section profiles for other industrial applications. In the development of shape rolling systems, roll pass design (RPD) plays an essential role on the quality control of products, service life of rolls, productivity of rolling systems, as well as energy consumption of rolling operations. This study attempts to establish a generic strategy based on hybrid modeling and an improved genetic algorithm, to support the optimizations of RPD and shape rolling operations at a systematic perspective. Objectives include improving the quality and efficiency of RPD, reducing energy consumption of shape rolling, as well as releasing the demands on costly trails and expert knowledge in RPD. Hybrid modeling based on cross-disciplinary knowledge is developed to overcome the limitations of isolated single-disciplinary models. And conventional genetic algorithm is improved for the implementation of optimal design. Targeting to integrate empirical data and published reliable solutions into optimizations, a parameters estimation method is proposed to transfer the initially misaligned models into a uniform pattern. A tool based on the Matlab platform is developed to demonstrate the optimal design operations, with case studies involved to validate the proposed methodology.

关键词： Roll pass optimal design Hybrid modelling Genetic algorithm Parameters estimation

Development,verification and application of a versatile aerosol calibration system for online aerosol instruments

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Particuology 2023年第3期74卷 48-55页

作者： Chengfeng Liu Cheng-Jung huang kan huang Sheng-Hsiu huang Juntao Huo Yusen Duan Yanfen Lin Center for Atmospheric Chemistry Study Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3)Department of Environmental Science and EngineeringFudan UniversityShanghai200433China Zhang Jia International Co. LTDTaipeiTaiwanChina Institute of Environmental and Occupational Health Sciences College of Public HealthTaiwan UniversityTaipeiTaiwanChina Shanghai Environmental Monitoring Center Shanghai200235China IRDR ICoE on Risk Interconnectivity and Governance on Weather/Climate Extremes Impact and Public Health Fudan UniversityShanghai200433China Institute of Eco-Chongming(IEC) Shanghai202162China

Traditional calibration methods mostly focus on the calibration of detection systems while the calibration from the sampling and pre-condition systems to the detection system is usually *** this regard,a Primary Standard Aerosol Mass Concentration Calibration System(PAMAS)is developed for the whole-process calibration of time-resolved aerosol measurement *** is composed of a particle generation chamber,an ultrasonic atomizer,a dilution system,and a syringe *** is designed to steadily generate standard aerosol particles of known concentrations(≤250μg/m^(3)),chemical compositions,and stable particle size *** aerosol can be generated in the size range of hundreds of nanometers to several micrometers with a narrow size *** generated particles with different compositions generated by PAMAS have been well verified by the filter-based gravimetric method,yielding accuracy and R^(2) of more than 95%and 0.999 in a wide concentration *** response time by changing the target concentration of reference particles is 1-2 *** has been applied to various types of time-resolved aerosol measurement instruments,including particle mass concentration monitors(Beta Attenuation and Tapered Element Oscillating Microbalance),online Ion Chromatograph,and semi-continuous OCEC carbon aerosol *** consistent results between PAMAS and calibrated instruments can be obtained if the instruments are functioning *** for instruments with certain technical issues,PAMAS can serve as a good tool for performance evaluation and quality assurance of the instruments and the accuracy of the measurement data can be adjusted based on the calibration results.

关键词： PAMAS Whole-process calibration Time-resolved aerosol measurement instruments

小净距盾构隧道侧穿地铁车站对地表沉降及刀把段结构侧墙变形的影响

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水力发电 2024年第5期50卷 32-37,109页

作者：黄戡刘汝宁傅铁军周京长沙理工大学土木工程学院湖南长沙410114 深圳大学土木与交通工程学院广东深圳518061

为研究小净距盾构隧道侧穿地铁车站对地表沉降及刀把段结构侧墙变形的影响规律,依托长沙轨道7号线云环区间段,对盾构施工引起的地表沉降和刀把段侧墙位移进行持续监测,采用有限元软件,分析在袖阀管注浆加固条件下侧墙的变形和应力特征,... 详细信息

为研究小净距盾构隧道侧穿地铁车站对地表沉降及刀把段结构侧墙变形的影响规律,依托长沙轨道7号线云环区间段,对盾构施工引起的地表沉降和刀把段侧墙位移进行持续监测,采用有限元软件,分析在袖阀管注浆加固条件下侧墙的变形和应力特征,研究不同地层损失率条件下地表和侧墙的变形规律及不同侧墙厚度条件下侧墙的应力规律。结果表明,袖阀管注浆加固土体能有效减小由盾构施工引起的侧墙变形和应力;地表沉降和侧墙位移随着地层损失率的增加呈递增的趋势;侧墙厚度设置为800 mm时,侧墙所受拉应力可以控制在C40混凝土抗拉强度标准值之内。

关键词：地铁盾构隧道小净距刀把段结构地层损失率数值分析地表沉降侧墙变形

基于PSO-RF混合算法的盾构参数预测研究

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交通科学与工程 2024年第3期40卷 117-127页

作者：黄戡张文杰李宇健长沙理工大学土木工程学院湖南长沙410114

复合地层是盾构隧道施工过程中常见的地层类型,但关于复合地层盾构掘进参数的研究相对较少。为研究不同盾构参数间的相关性,依托长沙轨道交通6号线湖白区间隧道工程,利用随机森林算法(random forest,RF)构建了盾构掘进参数预测模型,结... 详细信息

复合地层是盾构隧道施工过程中常见的地层类型,但关于复合地层盾构掘进参数的研究相对较少。为研究不同盾构参数间的相关性,依托长沙轨道交通6号线湖白区间隧道工程,利用随机森林算法(random forest,RF)构建了盾构掘进参数预测模型,结合数理统计和基于随机森林算法(RF)的PSO-RF混合算法模型对盾构掘进参数进行预测,并对预测结果进行误差验证。研究结果表明:将盾构隧道区间的地层物理参数与盾构掘进参数分别作为输入参数和输出参数,导入PSO-RF混合算法模型中进行训练学习,结果显示5种盾构参数预测值与实际值之间的平均绝对百分比误差大多在20%以内,即预测结果达到了泛化能力与预测能力的验证要求。

关键词：盾构隧道掘进参数随机森林粒子群算法

A New Diagnostic Method Applied to Gearbox Missing Gear Faults——LOD-ICA

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Energy Engineering 2022年第3期119卷 1219-1238页

作者： Lida Liao Bo Xiao kan huang Bin huang kang Zhang Changsha University of Science&Technology Changsha410114China China Construction Eighth Engineering Bureau Limited Tianjin200122China University of South Australia AdelaideSA 369977Australia

With the increasingly stringent requirements for carbon emissions,countries have increased the scale of clean energy use in recent *** an important new clean energy source,the ratio of wind power in energy utilization has been *** horizontal axis wind turbine is the main form of wind power generation,which is subject to random wind loads during operation and is prone to various failures after a long period of operation,resulting in reduced power generation efficiency or even *** order to ensure stable external power transmission,it is necessary to perform fault diagnosis for wind ***,the traditional time-frequency analysis method is *** paper proposes a new LOD-ICA method to realize the resolution of the vibration signals mode mixing problem incorporated the merits of both *** LOD-ICA method and the LOD method based on noise-assisted analysis decompose the same signal to produce different signal *** feasibility of the LOD-ICA method was verified by comparing the correlation coefficients between each of the signal components generated by the two methods and the original *** the field of wind turbine fault diagnosis,the LOD-ICA method is employed to the fault characteristics of gearboxes to extract the fault signs of vibration signals,further demonstrated the superiority of the LOD-ICA method in processing vibration signals of rotating machinery.

关键词： LOD method based on noise-assisted analysis fast ICA method gearbox feature extraction